CLIP: Enter at the object prompt ends silently

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/command_driver/mod.rs

@@ -1295,7 +1295,9 @@ impl OpenCADStudio {
         self.tabs[i].snap_result = None;
         self.tabs[i].scene.clear_preview_wire();
         self.restore_pre_cmd_tangent();
-        self.command_line.push_output(&msg);
+        if !msg.is_empty() {
+            self.command_line.push_output(&msg);
+        }
     }
 
     fn handle_report_measurement(&mut self, msg: String) {

src/command.rs

@@ -1943,7 +1943,8 @@ pub enum CmdResult {
         p1: DVec3,
         p2: DVec3,
     },
-    /// Print a measurement result to the command line and end the command.
+    /// Print a measurement result to the command line and end the command
+    /// (an empty one ends it silently).
     Measurement(String),
     /// Print a measurement result and keep the command active.
     ReportMeasurement(String),

src/modules/insert/xclip.rs

@@ -550,9 +550,10 @@ impl CadCommand for ClipCommand {
         self.inner.as_mut().and_then(|c| c.on_text_input(text))
     }
     fn on_enter(&mut self) -> CmdResult {
+        // Enter before an object is picked ends CLIP without a message.
         self.inner
             .as_mut()
-            .map_or(CmdResult::Cancel, |c| c.on_enter())
+            .map_or(CmdResult::Measurement(String::new()), |c| c.on_enter())
     }
     fn on_mouse_move(&mut self, pt: DVec3) -> Option<WireModel> {
         self.inner.as_mut().and_then(|c| c.on_mouse_move(pt))